Critical behavior of Gd₂Rh₃Ge intermetallic compound

The critical behavior of a new ternary intermetallic compound Gd₂Rh₃Ge has been investigated around the second order ferromagnetic transition temperature (T_C). The field dependence of magnetic entropy changes and isothermal magnetization at critical temperature were used to study critical behavior in Gd₂Rh₃Ge. The exponents β = 0.299(2) and γ = 1.042(1) were evaluated from the modified Arrott-plot method, while β = 0.308(1) and γ = 0.982(2) were estimated through the Kouvel-Fisher method. The reliability of the obtained critical exponents were examined by using the universal scaling hypothesis. These estimated values for the critical exponents indicate that the ferromagnetic compound Gd₂Rh₃Ge has long-range interactions between spins, which decays with distance (r) as J(r) ∼ r^-(σ+d) with σ = 1.91.